Home / vulnerabilities Ubuntu Security Notice USN-2779-1
Posted on 21 October 2015
Source : packetstormsecurity.org Link
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Ubuntu Security Notice USN-2779-1
October 20, 2015
linux vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.04
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
It was discovered that the Linux kernel did not check if a new IPv6 MTU set
by a user space application was valid. A remote attacker could forge a
route advertisement with an invalid MTU that a user space daemon like
NetworkManager would honor and apply to the kernel, causing a denial of
service. (CVE-2015-0272)
It was discovered that virtio networking in the Linux kernel did not handle
fragments correctly, leading to kernel memory corruption. A remote attacker
could use this to cause a denial of service (system crash) or possibly
execute code with administrative privileges. (CVE-2015-5156)
It was discovered that the Reliable Datagram Sockets (RDS) implementation
in the Linux kernel did not verify sockets were properly bound before
attempting to send a message, which could cause a NULL pointer dereference.
An attacker could use this to cause a denial of service (system crash).
(CVE-2015-6937)
Ben Hutchings discovered that the Advanced Union Filesystem (aufs) for the
Linux kernel did not correctly handle references of memory mapped files
=66rom an aufs mount. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code with
administrative privileges. (CVE-2015-7312)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.04:
linux-image-3.19.0-31-generic 3.19.0-31.36
linux-image-3.19.0-31-generic-lpae 3.19.0-31.36
linux-image-3.19.0-31-lowlatency 3.19.0-31.36
linux-image-3.19.0-31-powerpc-e500mc 3.19.0-31.36
linux-image-3.19.0-31-powerpc-smp 3.19.0-31.36
linux-image-3.19.0-31-powerpc64-emb 3.19.0-31.36
linux-image-3.19.0-31-powerpc64-smp 3.19.0-31.36
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.
References:
http://www.ubuntu.com/usn/usn-2779-1
CVE-2015-0272, CVE-2015-5156, CVE-2015-6937, CVE-2015-7312
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.19.0-31.36
